William



HARRY ARMER oALLAHAN, OF BRADFORD,

PENNSYLVANIA WILLIAM C.

GALLAHAN, ADMINISTRATOR OF SAID HARRY ARMER CALLAHAN, DE-

CEASED, -AssIeno or ONE-HALF PLACE.

TO LE R05? L. HIGGINS, or SAME DYNAMITE.

SEECIFICATION formingpart of Letters Patent No. 525,188, dated August 28, 1894. Application filed July 21,1893. Serial No. 481, 7- (No specimen) To all whom it may concern.-

Be it known that I, HARRY ARMERCALLA- HAN, of-Bradford, in the county of McKean and State of Pennsylvania, have invented a new and Improved Composition of Matter to. be Used as an Explosive, of which the following is a full, clear, and exact description.

This composition is to be used as an explosive of a high or low grade, as may be desired, and which issafe to transport and to handle.

In order to produce an explosive having fifty per cent. of nitro glycerin I use fo:ty pounds of pulverized coke put into a tray for mixing with ten pounds of acetate of lime, and fifty pounds of nitroglycerin, to produceone hundred pounds of the explosive, which The? forms a mixture curiously water-repel- For one hundred pounds of fifty per cent.

safety powder or dynamite in granular form,

I use fifty pounds of acetate of" lime and fifty pounds of nitroglycerin, thoroughly mixed together to prepare the explosive ready for use.

To make an explosive of a different grade,

I use different proportions or weightsof the absorbents above referred to.

The explosives thus prepared are safe to handle and to transport.- I am enabled to make dynamite as low as seven and one-half per cent., and which can be exploded in confinement only and with a mercury cap alone.

As before stated, the ab'sorbents are acetate of lime and powdered coke, and with these materials lam enabled to produce a powder in regular dynamite form or in granular form,

'so that the explosive can be put up in kegs the same as ordinary gun-powder.

Having thus fully. described my invention,

'1 claim as new and desire to secure by Letters Patent-- :1. An explosive comprising nitroglycerin and acetate of vlime, substantially as described.

2. An explosive consisting of nitroglycerin and a mixture of pulverized coke and acetate 4,5

of lime, substantially as described.

HARRY ARMER CALLAHAN.

Witnesses:

LE ROY L. HIGGINS,

' ANDREW P. HIGGINS. 

